I have an older blade that just seems to have a propensity to rusting, even stored in my dry box with all of my other razors that are just fine and not rusting at all! I think the different steel is part of the problem, but anyway, as an older blade I wouldn't mind it having an aged look, and I was wondering if anyone has ever intentionally created a tarnish on the blade and how they do it.

I know that a nice patina protects the underlying metal from rust, but I have never heard of a way to create that layer.

Any tips are appreciated!